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JeremyW
Posts: 1530
Joined: Sun Nov 13, 2011 12:53 am
Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 1:24 pm

I have noticed in the past cell pair #57 has deviated when getting down below low battery warning. Soon it was "around" low battery warning. Then ~70 gids. Now, around 100 gids it starts deviating. It's obvious to me that I have a cell pair that is aging prematurely. Last night after going to 17 gids and checking leafspy, I know something is seriously wrong. Yes, I had/have regular capacity degradation but lately I wouldn't feel confident taking more than a 30-40 mile round trip with the car. My use for the leaf is very local, about 12 mile commute and 14 miles round trip to the girlfriend's house. But even with those very modest requirements I'm starting to really feel the pinch.

Image

The car goes to Glendale Nissan this afternoon, hopefully. This will be the thread where I document the progress. Due to the pack's age I don't think Nissan will be able to get away with replacing just the module, but we will see....
Former 2012 SL leasee 6/23/12 - 9/23/15
Now driving Honda Fit EV, License plate: CHADEMO
2000 Honda Insight for long trips

DaveinOlyWA
Posts: 12574
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 1:28 pm

keep us posted!
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 deceased. 29,413 miles. 2018 S40; 129 miles, 491 GIDs, 38.1 Ahr available, 100% on everything else :)
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

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mwalsh
Posts: 9483
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 1:37 pm

Good luck!
2011 Blue Ocean SL with 72,000 miles.
2015 pack under warranty 12/30/15.
Tinted windows.
Michelin MXV4 tires.
L1 EVSE upgrade.
FIAMM horns.
Superbright LED lighting.
2013 sun visors.
LED shifter.
Heated seats.
GT-R map lamp lenses.
AV L2 EVSE.

Computerizer
Posts: 189
Joined: Fri Dec 21, 2012 2:13 pm
Delivery Date: 19 Dec 2012
Location: Bellingham, WA, US

Re: Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 3:11 pm

If there's a chance that you might qualify for a new pack under the battery warranty (the loss of 3 bars within so many years or whatever it is), consider that if you get this cell's module replaced, it may increase your capacity such that you would no longer qualify for that warranty replacement within the time limits of the warranty. Then you will find yourself wondering whether you would have rather replaced one cell module or the entire pack.
Tyrel Haveman
Founder of North Sound Electric Vehicle Association
2013 LEAF SL (Brilliant Silver); Prev: 2016 Kia Soul EV+ (Titanium Grey); 2013 LEAF SV (Blue Ocean), 2012 LEAF SL (Glacier Pearl)
100% Solar PV (12.125 kW ground-mount)
Bellingham, WA

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JeremyW
Posts: 1530
Joined: Sun Nov 13, 2011 12:53 am
Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Re: Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 3:38 pm

Two things:

1. I do not qualify for the capacity warranty because I opted out of the lawsuit. Further, this is a lease that will not qualify for 4 bar loss before September 2015 when the lease is up.

2. My range loss is significant and I need every damn watt-hour since I currently only charge in public.
Former 2012 SL leasee 6/23/12 - 9/23/15
Now driving Honda Fit EV, License plate: CHADEMO
2000 Honda Insight for long trips

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drees
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Joined: Fri Apr 23, 2010 3:51 pm
Location: San Diego

Re: Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 3:55 pm

Good luck!

FWIW, I estimate that an average cell voltage of 3.74 should give you a SOC around 20% and an average cell voltage of 3.59 should give you a SOC around 10% based on some voltage logging / plotting I did a while back.
'11 LEAF SL Powered By 3.24 kW Enphase Solar PV

User avatar
JeremyW
Posts: 1530
Joined: Sun Nov 13, 2011 12:53 am
Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Re: Taking my leaf in for Cell Voltage Loss Inspection

Thu Nov 13, 2014 7:34 pm

Dropped the car off, I gave them the two pages from the service manual and a screenshot of leafspy. Got a Altima for two days (after that I'll be driving my insight till the car's fixed), and thankfully my carwings says they didn't try to charge it (I brought it in just over LBW, it's now somewhere between LBW and VLBW).

So a thumbs up to Glendale Nissan, so far. :)

Oh and this morning I noticed that the deviation started at 120 gids (~30mv difference between average and cell pair #57). :shock:
Former 2012 SL leasee 6/23/12 - 9/23/15
Now driving Honda Fit EV, License plate: CHADEMO
2000 Honda Insight for long trips

User avatar
JeremyW
Posts: 1530
Joined: Sun Nov 13, 2011 12:53 am
Delivery Date: 23 Jun 2012
Leaf Number: 19136
Location: San Gabriel, CA

Re: Taking my leaf in for Cell Voltage Loss Inspection

Fri Nov 14, 2014 1:03 pm

Update: Nissan told me to pound sand.

Got a call from Glendale Nissan who said the car passed the CVLI test and that the tech line told them this was simply normal battery degradation.

It is not. The degradation was sudden over the last month. It is obvious that I have a cell that is weaker than the rest of the pack. Further, it looks pretty obvious that the car should fail this test.

I will continue to drive the car normally, documenting how fast this cell ages. I give it about a month before it throws code P33E6, which is for cell imbalance.

I will also begin to communicate with higher ups in Nissan.
Former 2012 SL leasee 6/23/12 - 9/23/15
Now driving Honda Fit EV, License plate: CHADEMO
2000 Honda Insight for long trips

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drees
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Joined: Fri Apr 23, 2010 3:51 pm
Location: San Diego

Re: Taking my leaf in for Cell Voltage Loss Inspection

Fri Nov 14, 2014 1:42 pm

Given the lack of luck people have had Nissan dealers running the CVLI test and failing it, I can't say I'm surprised.

It seems like if you don't trigger an error code, you have very little luck in getting Nissan to acknowledge an issue.

Oh well. It doesn't look like you have long to wait if it's gotten this bad in a month.

How well is the pack balanced at 80% and 100%?
'11 LEAF SL Powered By 3.24 kW Enphase Solar PV

smkettner
Posts: 7064
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Taking my leaf in for Cell Voltage Loss Inspection

Fri Nov 14, 2014 2:21 pm

What is the criteria to fail?
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV

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